package com.zhangzhan.config;

import com.zhangzhan.filter.JwtAuthenticationTokenFilter;
import com.zhangzhan.handler.AccessDeniedHandlerImpl;
import com.zhangzhan.handler.AuthenticationEntryPointImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

@Configuration
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {


    @Autowired
    JwtAuthenticationTokenFilter jwtAuthenticationTokenFilter;

    @Autowired //认证异常
    private AuthenticationEntryPointImpl authenticationEntryPoint;

    @Autowired //授权异常
    private AccessDeniedHandlerImpl accessDeniedHandler;

    @Bean
    public PasswordEncoder passwordEncoder(){
        return new BCryptPasswordEncoder();
    }
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                //关闭csrf
                .csrf().disable()
                //不通过Session获取SecurityContext
                .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS)
                .and()
                .authorizeRequests()
                // 对于登录接口 允许匿名访问
               .antMatchers("/user/login").anonymous()
//                // 除上面外的所有请求全部不需要认证即可访问
//                //需要携带token操作:
               // .antMatchers("/content/tag/list").authenticated()
                 // .antMatchers("/user/logout").authenticated()
                  .anyRequest().permitAll();


        //不适用框架自带的退出登录
        http.logout().disable();

        //配置security异常捕获方法
        http.exceptionHandling()
                .authenticationEntryPoint(authenticationEntryPoint)
                        .accessDeniedHandler(accessDeniedHandler);



        //配置过滤器优先级
        http.addFilterBefore(jwtAuthenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);


        //允许跨域
        http.cors();
    }



    @Override
    @Bean
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}